Sender: Cloudsky (small four), letter area: security title: Do you try to send a letter: Wuhan Baiyun Yellow Crane Station (Mon Apr 17 19:52:54 2000), many people in the station have asked how to get started, I don't know what door to ask. I rarely read some good articles patiently from the head, I have a deep understanding this time. For example, Yuan Ge's Sniffer principle has always thought that he was very clear about the principle of Sniffer, so he did not read this article in Yuan Ge. Later, I have discussed the night and Yuan Ge, how to get the MAC address directly through port reading, why Antisniff can get a real MAC address, not by changing the impact of MAC address technology, how to get a real MAC address under Linux. I have been reading and writing of ports under Linux, I always think that the ports in the protection mode have done a memory image. As a result, Yuan Ge asked me, you carefully see that I wrote the article, I have, I have to print a lot of documents, I am forced to filter them, and I have found that Yuan Ge's article made me new. understanding. Then I organize a few buffers to TT overflow, especially the above about Solaris can load the kernel module, that is more embarrassing. I used to say that the book is not read, and now the article is left on the hard disk but not read. In fact, this version has been many classic articles, but also recommended a lot of classic books, have a few very much. W.Richard.stevens' unp, I have a serious look, Apue is not so serious, and half of the volume II is seriously read, read the reading notes, the volume III doesn't look at a page. Douglas's Volume I, Volume III is a serious look, volume II is only intermittent. And many technical articles, if you get your hands, you will be too lazy, but I don't know how much resources are wasted, how much resources have been ignored. Is BBS to really learn something? Rain said no, I said it is not. But here can open the horizons, you can get guidelines in the big direction, enough. I have always hoped that everyone learned here is not the technology itself, but the learning method and a unseafulness. Many technologies, tomorrow will time, if you have a learning method, then you still have a chance, if you master this technology itself, you have no chance. In fact, I really don't understand system security, because I have always liked to watch the program writing programs but I don't like it or have no ability to attack who's host / site. What I can do here is to provide you with a direction, a kind of enthusiasm for your fanaticism. If you have even "WINDOWS NT Device Driver", "Win9x System Programming" has not been seen, but it is necessary to write something hidden hippo and funny. If you don't look at the assembly language, you will ask the principle of Exploit Code, then I can't answer you and I don't want to answer you. There is always a responsibility, you have to ask for a statement, saying that Questions have not answered. If you don't answer it is already the right way, at least you have not returned to you, read the book, right, at least no disturbance, let you sternly sullen. Unix's Man Manual You have to read it, I don't want UNIX. Microsoft's MSDN, Platform SDK DOC you have to finish, you want to find Win programming to find a reason. Or the sentence, a programmer does W.Richard.stevens, and after the death of the world, the top Hacker in the world can miss the text, but they have never been attacked, think about it, then Is it a kind of realm, it is a bit of light. We can discuss technical problems, and we can discuss technical issues, but there is no intentional knowledge, and the list of resource information is repeated.
I just posted a bunch of ISBASE articles in front, the beginning is the home page ID, but immediately asked what home page? I just discussed how to modify the MAC address, and I will come again later, and there is only 3 articles before and after. Choosing silence is already the excellent performance of many friends' endurance. Many things can be lifted. Vertex's LIDS, is tracked by PacketStorm, and you have to read the three articles of THC, I feel that I understand a bunch, all the hands and feet on the kernel module. You don't see how you know. I don't want to fall into the discussion of specific technical issues here. If you think that you do something, you will go to see yourself. No one has a shelf, and there is no life to do this. You ask yourself, do you try your best? Attached to a small four story visit Zhonglian Global Union Information Technology Company Chen Qing "... I have always hoped that everyone learned here is not the technical itself, but learning methods and a unfairness. Many technologies, tomorrow Out of time, if you have a learning method, you still have a chance, if you master this technology itself, you have no chance ... "This is the" small four brother "that is widely circulated online. Classic post - "Do you try our best?", I use it as a story of "Xiaodi" places the legendary story, because I think this post and this sentence can be highly summarized "small "The four" people, including his academic attitude and philosophy. "Small Four" This name Chen Qing is one of the popular elite characters in the domestic network security community. After Yuan Ge, Warning3 and others, "Green Alliance Technology" is another technical backbone, and the underlying analysis of the underlying under the UNIX / Linux system. Behind this, behind this, there are very low-key, prestigious, he only recognizes a self-evaluation: "I am just an ordinary UNIX programmer." A fire in the afternoon in July, I am The office building of the "Zhonglian Green" is interviewed with a small four. The small four in front of it makes me feel the gap between reality and imagination. Medium thin body, white bone feelings, and resident frank eyes after the resin lens. A black working t-shirt with "Green Alliance" company, a "seemingly cheap" beige trousers, a pair of "absolutely cheap" "Thousands of layers" cloth shoes. It is highlighted in a high-grade list-name suits in high-end Office. When holding his take-tremend, I felt a kind of enthusiasm of natural, and suddenly fell a strange feeling. Subsequently, we sat in the quiet session, listening to the past, the story of the past ... The story story in the "ivory tower" said from the name of "Xiao Fou", no one thinks "Xiao Fi" and "Mud "What is related? In 1997, Chen Qing, a computer software of the Changsha Railway Institute's Electronic Engineering Department, through China Education Research Network, "MUD" is the "mud" is "mud" is a well-known classic game, Chen Qing is also awkward among them. When I played "mud", he got a "small four" such a name to use himself, "The rivers and lakes are more concentrated and the oriental color". The net name often follows people's usage habits, so "Small Four" is called until today. All volunteers filled with "Small Four" college entrance examination are related to computer, and they are not contemplated from distribution to other majors. There is so much a lot of interest to the computer, which is strongly interested in contacting the Basic language course. This interest in this interest in Chen Qing, who has been keen on various types of mathematics competitions, has changed the original intention of the college entrance examination mathematics. Coincidentally, from Yuan Ge to the small four, they originally have strong talents and strong interests in mathematics, and it seems that people with mathematical talents are more likely to achieve highlights in the computer technology. Computer professional students have less than every day with computers. That is also the age of DOS3.1, and the small four and classmates have begun to study the virus. This seems to be something that most interested in computer technology at that time, becoming a lot of masters, such as Yuan Ge and Huang Xin.
The study of viruses naturally infected, the school opened a compilation course in the 20th, and many of the students have learned the masters of the compilation, "Sheng Feng", and the classmates: "After you have a virus after you , I compile the virus software, everyone earned each money. "Gun wrote compilation, it is thousands of lines of code. Small four, exercises, practicing some of the programs to check the virus, which is the characteristics of the virus like to change the system interrupt vector, and the operating system is monitored by hardware programming. He also discovered a small problem in the country's Jiangmin KV100 anti-virus software that has been popular across the country, that is, the KV100 has an anti-virus, and some content is modified in the computer memory address, but does not recover after exiting. Later, Xiao Fi and 3 students used compilation to realize a comparative "bold" idea - replace the command.com executive file in the MSDOS operating system, replaced by self-compiled files, and doing very successful, loading Windows3.1 There is no problem, which makes them a sense of accomplishment. Because of the compilation and DOS mastering, it is difficult to accept DOS to the transition to Windows3.1, so that he has a small break in Windows programming, the small fourth is to skip Windows3/3.2. Directly use Windows95, the fast update of computer technology makes this breaking. Four years, most of the family of small four is used in libraries and bookstores, and have read many compilation books and materials, and the lottery is copied. The research compilation has reached an obsessed, and even the time, the Parameter manual of the hard disk controller is even more time, and the dream can be written in the case of the floppy disk. He tried to find it from these parameter manuals. The problem that can be used, open the breakthrough, but the final reason tells yourself, this is theoretically impossible. At school, Xiaodi also contacted a NOetWare network system of Novell, who had colloquobleed in the microcomputer network operating system, and performs programming based on IPX / SPX communication protocol under this platform. Soon "Java boom" swept the global industry, the small four of the graduation thesis is preparing to use Java programming as a topic. To achieve network programming under Java, you have to build a network development environment based on TCP / IP protocols. With the help of the teacher, he used a 16M memory computer as an NT server, with several computer groups running the Win95 computer, and then began to study the TCP / IP protocol and the underlying network communication under Java and the Socket network. Program. Unlike many programmers, it is more likely to deal with the underlying thing than the UI (User Interface), which allows him to maintain a curiosity of the ultimate secret of things. However, Xiaodi believes that it is also very gorgeous thing to develop outstanding practical procedures on the application layer. They also have a very good, helpless computer technology has developed to today, and the subjects are more and more thin. To your most interested place. Looking back at the university life, the small four shots have not been sentimental. For example, the original accumulation of knowledge is completed. It is this like a tattar practice to make him a possibility of "Swordsman" in the future. The story of the small station This section describes you about the "Legend" experience of the small four semester. The so-called "legend" is because it is related to the fate of a small four-day life. In the summer of 1997, Xiaodi University graduated. With his "frontier province identity", according to the principle of graduation allocation of the "where to come back", in addition to the northwest, the small four seems else. In the case where you don't know, the file is turned away by the Lanzhou Railway Bureau, which is assigned to a group station called Yinshui Bridge in the Yinchuan Railway Branch of Ningxia, which is still hundreds of kilometers from Yinchuan City. The living environment here is very poor, surrounded by Gobi desert.
At that time, his salary was 425 yuan per month, but all the reasons, finally sent to the remaining area of 245 yuan! In 1997, even the northwestern price of price is very low, eating is also a problem. Even if this is the case, his idea is to arrange the computer work center in the station, you can contact your computer, and you will not leave. But such a minimum requirement was not satisfied. He finally got to the "transfer group" by the station, and even a "dispatcher" has also become a propoy. The specific work is "train" that he can't think of it before! That is, picking the car, pull it. The small four humor said: "I want to be a 'Railway guerrilla' ', this is a dream." But with the novelty for this job, he started working enthusiasm, and did not think a computer It is not appropriate to use the hand of professional high-profile students to pick up the keyboard. Recalling that year, every detail of the whole process of "picking, bike, and braking" is still as familiar with the program code, from mechanical principles to specific operation steps, Telling Zujin Lao. With his depiction, the heavy and simple repetitive labor is also a pleasing "behavioral art." Looking at the slightly white scholar in front of him, how can I imagine his northwest Gobi Railway line in the "Desert Lone", leading and decomposing the "Iron Han Zhen" of the steel dragon! Maybe this is a misunderstanding of life, maybe this is a small test and experience in his life. When 3 months of "Railway Guerrier", "Rough Hao Mai" life has gradually faded, and it is boring and boring. Chen Qing also begins seriously thinking that he is the future and existing value of programmers. He started Strongly aware of this is a waste of life, and economic constraints are also on the verge of reaching out to reach out in poverty. So he wrote a letter to the master and classmates of the alma mater, expressing the desire to return to school. In the time, the teacher who was a master school network center was very impressed by Chen Qing, a very good graduation design, and promised to help this. As the railway does not let people, there is only a road to "expense", and the work is impossible. But there is a backdron, and the simple bag of the small four back, it has embarked on the trains of Dongjin. "I went to the stationmaster for 1 hour before the train, I went to the stationmaster to tell the station, and I also expected that he can transfer to me, but he said that there is no such right, it requires the Lanzhou Bureau to approve, and persuade me Retain, even if I want to tune me to the station calculation center, I will be willing to leave? I know that I have never been able to turn my heart, so I don't say any complaints, I only emphasize the difficulties of the family, hope to get The understanding of the station. Now I think of my thoughts I can't believe it. When I just came to the station, I thought, just gave me the computer keyboard, just let me touch the computer keyboard, let me give it a life here. The ribbon FoxPro database program is also! I have entered the party in school and is affected by the education of the military family environment. I am also a very organized concept. "Xiao Fai recalls. When it comes to it, there is a person who has made a small four, that is, the only station member secretary of the group committee for him. "The Secretary of the Group Committee is a 26-year-old transfer, we have been very good for me. I have given me a lot of care. I only have one person to send me with my luggage. He said in the station, I am a lifetime. I can't forget, he said: 'I will wait for you here for an hour. If you wait for you after an hour, I will go back.' Because the train has a small station for half an hour, you can get off here again Other cars returned to him, I really hope that I will stay, we have to live together for more than 3 months, and friendship is very deep.
I was very moving, but I still said to him: 'You don't wait, I will definitely not come back! '"Finally, the secretary did not say anything, but took out 1000 yuan in the hands of the small four. After the four left, I really didn't look back. The story of the hopping is 3 months, the small four returned again. Changsha alma mater. The teacher arranged him to work to the school network center. Because he could not work, he could only work with the outer temporary identity, but only more than 700 yuan per month, but the small four did a very happy, because finally Touching the computer keyboard, this is more important than anything. Because Xiaomi won the excellent graduation design with Java for the topic, the teacher arranged him to engage in Java development. In the meant, he participated in the development of a network-based paper-free office. The system. That time, Xiao Fouger's research on Java is unprecedented. It also serves as the moderator of Shuimu Tsinghua Java version while developing. In April 1998, Java developed a paragraph, and the school network center and Hunan Mobile Company A cooperation development project, tune the small four to Unix-based programming. When he was going to school, he had touched the programming under the school's SGI graphics workstation, and it was not difficult to develop it. At the time, the telecom communication system The relationship between serial port and X.25 group exchange agreement, this practice makes small four skills increase, and has accumulated rich development experience. He has developed a program that tried to exchange communication with the exchange of exchanges, this is him. The only program developed by VC. Soon, he was sent to the digital switch, all transferred to C language programming under Unix Solaris. Because it is through China Education Research Network, free, If you visit the "teaching research network", the external site is based on traffic bills. In order to "break through the limit", the small four will find some "meat chicken" agents to go abroad. Now, this is the first time in Xiaodi. Network security is related. Later, the content of foreign "hackers" seen from the books also stimulated his strong interest in cybersecurity technology. In 1997, the Internet had just happened in China. Most of the Internet has a certain computer technology. And the high-grade undergraduate or graduate student in computer related majors, with their online exchange accelerated the technical steering from the field of small four-way network security. From 1997 to 1998, he successively contacted two now Global Colleagues Deepin and Yuan Ge, often patron the individual page of the two. This time is the most played in the Socket network programming, sometimes those DOS attack programs that can cause the Windows 95 Blue Screen. Sometimes he is also the benefit of it. To engage in small actions, for example, in the network and others online, he is eager to download the network speed and slow, he will "kick it", 趁 别 别 当 当 当 当 资 资 资 资 资 资 资 资 资 独 独The small four has been developed until February 1999. At this time he once again tired. 900 yuan monthly salary, in addition to his life, but also to study and living expenses for the sister of college. In the past, his undergraduate graduated I want to "postgraduate", the admission ticket is all done, but also Poverty, decided to give up on the day before the exam, and this wish is eventually not realized. The pressure of economic difficulties makes the decision to leave again to the school, just like the time from the northwest station. Before leaving, the director of the school network center is also a teacher who has received him to give him 1,000 yuan, and he also invited him to eat. In the face of the teacher who has been working hard, Xiao Si said: "Teacher, when you open a company, I will continue to do it with you!" A simple hat with a simple feet with a small four for the first time. Beijing. Different from the last time I returned to Changsha alma mater, this "migration" destination did not have his booking "receiving unit", which originally had a unit that he contacted him in Beijing. In the face of unknown prospects, the small four still has the encouragement of the teacher's self-confidence and the teacher's classmates.
Personal capabilities and Beijing's first refined network security development environment makes him convinced their choices. Sure enough, he went to the Beijing Institute of Domestic Communications Giants - Shenzhen Huawei, Beijing Institute, and developed in the Department of Agreement. However, the characteristics of the world, the company's characteristics and the needs of the company do not give full play to his talents and specialty, add the sudden illness of the father, after 3 months, he left Huawei, transferred to the true network security company of Qi Mingxing Chen. It can be said that Qi Mingxin is the beginning of a small four official intervene network security work. The head of the interview with his corporate network security department is a Ph.D. of the Chinese Academy of Sciences, giving him a test questions to develop a small procedure for "cutting off others TCP / IP connection", not a few days, I will pay a satisfactory answer. In the days of Qiming Stars, the small four intake of the network protocol and system security vulnerabilities, completing the development tasks, or some technical translations and documentation of the company. Because of the strong interest of network protocol, he likes to use protocol analysis software "to grasp (data) package". I feel that the Sniffer (olfactory detector) developed by others is not "foolified", I will write it myself. Long-term network programming, not only makes his network protocol and vulnerability analysis technology, but also the hard work of the C language, he joked with C language, "Old Bank" Java will not use it. In this way, he is a half year in the Queen Star. At the end of 1999, it was "Green Alliance" recruits to buy horses, and when it is hosted to go. Xiaodi encountered a friend on the Internet, and the director of the "Green Alliance" project director Deepin, the latter learned that after his status quo, it is recommended that he goes to "Green Alliance", the reason is that "Green Alliance" is already or is gathering a batch "Niu people" in the circle, including the "Warning3", "Warning3", "ADAM" of the small four, and the company's future development potential is huge. At the end of the year, the small four wanted to go to the year again. One day after the Spring Festival, Deepin came to the phone, about a small four together to go to the "Green Alliance" to see, Xiao Fouger only thinks "It is as good as the friend TT (Warning3)" is asced. When he went, he also got on his friends in Shuimu Tsinghua "hacker version", and it is also a colleague of the Green Alliance IPXODI. When I arrived at the "Green Alliance", the two were surprised by Deepin, and I found that there were 10 individuals, like some special gatherings. They saw the convene organizers - "Eye Rings", "Eye Rings" said that today, please come over. I have a meal of meritorious and I know each other. I have to open a small meeting. This little four realized: Is this "Green All Essay" "Established Swearing Conference"? It's a bit embarrassed soon, I feel that I am a "outsider". Let him unexpected things behind, he will then get a "meeting minutes" in advance, found that "Participant's List", the big name and ipxodi actually in column, he understood that Deepin came here today. Real intention. Later, I knew that under the recommendation of Deepin, I have been circled by the "Green Alliance" "training list". With this "both facts", the following things don't have to say, the second day, I will pay a resignation report, and then come to the "Green Alliance" to work. At the beginning to the "Green Alliance", the small four and Warning3, Yuan Ge equivalent in the "R & D department", the specific work is to develop network tools under various operating systems, mainly Sniffer, which requires developers to familiarize with various operating system platforms, and then That is to do some of the network tool programs, and he also wrote a lot of popularization tutorials such as "buffer overflow vulnerabilities". When he is missing, he also passes "customer technical support" outside. There is no giant, in the good technical atmosphere of "Green Alliance", the small four is very happy. Many people on the Internet know that there are many "posts" in the small four brothers, in many technical forums, especially in the "Baiyun Huanghe" BBS, with his "essence post".
It is mentioned that the small four and repeated modestly said that it is to learn from each other with the majority of netizens, many of which are the summary of the theory and experience of others, and some are translated articles. At the same time, he believes that no matter whether it is the technical direction or a document style, his post is more suitable for programmer reading reference. However, it is not familiar with the increase in these high-tech posts with the increase in the posts of these high-tech posts. The article begins with the article "Do you try your best? "Although there is no specific technical problem, many netizens are considered" Classic "collection, because they can feel that the realm of the face of the performance and honor always smile. Low-key small four interviews "... a programmer does W.Richard.stevens, and you can call the top Hacker in the world to miss the world after dying, but did not worry, think I want to see, what kind of realm is it, it is a bit of a little ... "This is the other eye on the small four" you do your best. " In addition to W.Richard.stevens, Chen Qing's idol also has the inventors of Bell Lab Plane9 and UNIX's father Ken Thompson and Dennis M.RITchic, set "Tu Wan" and "Olympic silver medal winner" in this legend. It has gone looks, but the small four feelings are the unclaimed realm of their confused. The philosophical thoughts of Xiao Si Zhuangzi have a great influence on ourselves. He is very adhering to the supernatural ecology of Zhuangzi to fame and fortune. He said that he once tempered, discussing technical issues with others, often struggling to face red and red, sharp, and do not leave the feelings. Although it is not right, it is difficult to accept it. Later, a small four respectful brothers learned about him, it suggested that he reads Zhuangzi. Zhuangzi "people don't fight with the sky" make him very touched. At first glance, it seems that there is a negative suspicion, but it is essentially a positive attitude of attaching objective laws. The small four faces in life are treated with the mature attitude of optimistic syndrome differentiation. Treatment is more followed and friendly. He will see his own important living standards in its own, plain low-key. With his own words, it is: "Don't jump!" The continuous "programmer" identity is emphasized in the middle and two times. He believes that a programmer's lifestyle should be willing, in the code line. Cultivate. At the time of impetuous trouble, he will go to the book of the Zhuang Zizi, and the life is like a dream, and the mood will soon calm down. Xiao Qui has been regrettable for the relationship between the party organization that is interrupted from the Yinchuan Railway Branch, which makes me feel a strong traditional organizational concept of the planning economic era, which is less in today's young people. And now his organizational concept is more performance as a "team spirit". He said that the "Green Alliance" provides him with an optimal technical exchange environment, and a person's ability is always limited, and the strengths of others are often in their own shortage. "A chopstick is very easy to break, but 10 chopsticks are difficult to break together", this is his understanding of individual and team, and it is also a consensus of the "Green League". In the period of the development difficulties of the "Green Alliance", in the face of other companies, he replied to the other party: "We came together at the time, I will leave them, then I left them. In the future, I still 'mixed'? "Big, but very much. The small four said that the technology itself, and the person who admired in the "Green Alliance" is Deepin and "Eye". The former's teenager is old, the latter's personality charm, he said, "There is' Eye", I feel that the company has hope, there is difficult, everyone can overcome. "The four families are very difficult, parents die early, The weight and responsibility of family life are falling in his shoulders. But I left a deeper impression that he didn't have the hard experience of his hardship family's honesty, but he narked the calm tone and relaxed look. Instead, this is the relief and ultra-off, I am more believed in studying the "Laozhuang".
